/Engine/Source/Runtime/Engine/Classes/Animation/AnimData/IAnimationDataController.h
Removes all the curves of the provided type. Broadcasts a EAnimDataModelNotifyType::CurveRemoved for each removed curve, wrapped within BracketOpened/BracketClosed notifies.
void RemoveAllCurvesOfType ( ERawCurveTrackTypes SupportedCurveType, bool bShouldTransact )